#VU56861 Exposure of Resource to Wrong Sphere in Cisco Systems, Inc products - CVE-2021-34723

Vulnerability identifier: #VU56861

Vulnerability risk: Low

CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2021-34723

CWE-ID:

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerable software:
Cisco IOS XE SD-WAN
Cisco 1000 Series Integrated Services Routers
Cisco 4000 Series Integrated Services Routers
Cisco ASR 1000 Series Aggregation Services Routers
Cisco Cloud Services Router 1000V Series

Software vendor:
Cisco Systems, Inc

The vulnerability allows a local user to overwrite arbitrary files on the system. 

The vulnerability exists due to insufficient validation of specific CLI command parameters. A local administrator can overwrite the content of the configuration database and gain root-level access to an affected device. 

Install updates from vendor's website.

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxesdwan-arbfileov-MVOF3ZZn